Conference microphone



FIG. 1 is a top plan view of a conference microphone showing our new design;

FIG. 2 is a side elevation thereof;

FIG. 3 is a bottom plan view thereof, drawn at a reduced scale; and

FIG. 4 is a fragmentary cross section taken on line 4--4 of FIG. 1. 

The ornamental design for a conference microphone, substantially as shown and described. 